Abstarct: Abstract One of the important parameters in designing the drilling and blasting pattern is to determine the appropriate direction of the fire front due to the state of the discontinuities, in order to prevent the loss of bubble energy of the explosive. The best direction of the explosion is the direction that the existing joints and cracks show the greatest resistance to gas exit. Providing the right direction of fire fronts for mineral extraction can reduce drilling volume, reduce the amount of explosives used, increase the progress step, reduce the problems caused by fire fronts (throwing stones and earthquakes) and finally reduce the cost of extraction. In this study, in order to achieve these goals, focusing on Nasim Bardaskan copper mine as a case study to evaluate fire front results by ODM method and determine the optimal direction of the fire front baxsed on geometric analysis of discontinuities baxsed on an explosiveness index (BI) been paid. The network of discrete discontinuities (DFN) has been used to model the joints condition of the area. The information required to build the model was obtained using linear harvesting and window harvesting and the DFN model was prepared using PFC3D software. Using image analysis and using Split Desktop software, the average crushing (X50) of the explosion in a pit of mine with number two was obtained for five blocks (A, B, C, D and E). According to the ODM method, blocks A, B and C are unsuitable and need to be optimized in fire front operations, and blocks D and E are considered suitable. In this research, optimization of fire operations has been done by changing the direction of fire front direction relative to the direction of the joints. Examination of the direction of blocks D and E with respect to the set of joints showed that the direction of the working front is almost perpendicular to the set of joints that have the highest slope, the least frequency and the shortest length. Accordingly, if the length of the workpiece in blocks A, B and C changes from 234 ((current extension) to 00300, the direction of the workpiece in these blocks is perpendicular to the seam handle with the highest slope, lowest frequency and minimum length. In order to evaluate the new proposed direction, the BI index has been used. The results show that by changing the direction of the front, the BI index decreases from 61.25 to 51.25. Due to the decrease in BI index, the amount of drilling and spending can be reduced by increasing the size of the fire pattern, which in turn leads to a reduction in drilling and fire costs. Therefore, for blocks A, B and C, the new proposed model is 3.5×3 or 3 ×2.8. As a result, by changing the direction of the fire front and the new proposed model, the amount of special consumption costs is reduced and it is predicted that some of the current problems of Nasim mine, including stone throwing and earthquake, quake and heel formation will be reduced.